"The Canadian Nuclear Safety Commission says as many as 217 workers may have been exposed to radioactivity at the Bruce nuclear power station on the shores of Lake Huron while refurbishing a reactor in late November.

It is believed to be one of the largest mass exposures to radiation at a Canadian nuclear site.

The station operator, Bruce Power, said a preliminary review of the radiation exposure indicates no one received an excessive dose. The company is taking the incident “very seriously,” said John Peevers, a Bruce spokesman, while cautioning that “all indications are that there is nothing there approaching the regulatory limit” for radiation."